<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>表单标签</title>
</head>
<body>

<!--form-->

<form action="#" method="get">
    name:<input name="username"><br>
    password:<input name="password"><br>
    <input type="submit" value="log in"><br>
</form>

</body>
</html>